Just outta curiosity, which fancy new brush pen is that? I’ve been experimenting with a coupla new ones lately myself (a Kuretake No. 13 and a Pentel Pocket Brush Pen, also known as a GFKP). They’re actually for calligraphy, but I like the line variation I get with them. Before that I was using a Faber-Castell PITT brush pen but the tip on that sucker lasts about 15 minutes, plus you don’t get as much variation in line weight.

It's a Copic multiliner brush pen. I haven't tried too many brush pens, but I like this one. It's harder to get the thin lines, but that might be a good thing. I think the actual brush wasn't doing what I wanted it too anymore, and the last two pages just look a lot better than the previous ones, in my opinion.